If the version of CapTP we have is ported to other languages, then you could do some of it, but probably not all. Haskell might be better up for some, but Python won't be able to do some of the more interesting parts (like the time-travel support) quite as easily since it's a much more mutation-oriented environment. Still, you could get systems talking to each other over the network if a compatible CapTP was implemented.

The networked actor-model bit & CapTP goes back to E originally[1]. The other contemporary real-world protocol based on this design is capnproto rpc[2], which has implementations in several languages including both Haskell (of which I am the author) and Python.

The ergonomics of the Haskell implementation could use some work IMO, and I've got some ongoing refactoring work on a branch. But it does work, and folks are using it.

[1]: http://erights.org/

[2]: https://capnproto.org/